E ^ **•!!>/* 



M C^. State Ooilege 



CONTENTS 



Page 



—^ • * * 



Preface iii 



Introduction vi 



Chapter 



I. — Process of Power Changes 13 



n.— Some Eminent Men 29 



ni.— The Age of Parents 45 



IV. — From Savagery to Civilization. . 56 



V.I — Evolution of Intelligence and 



Longevity 70 



^ VI. — Disease and Immunity 82 



Index 105 





